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CVE-2026-34211

HIGH CVSS: 7.5 Published: 2026-04-06 Modified: 2026-06-17

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, the @nyariv/sandboxjs parser contains unbounded recursion in the restOfExp function and the lispify/lispifyExpr call chain. An attacker can crash any Node.js process that parses untrusted input by supplying deeply nested expressions (e.g., ~2000 nested parentheses), causing a RangeError: Maximum call stack size exceeded that terminates the process. This vulnerability is fixed in 0.8.36.

Affected Platforms

Nyariv Sandboxjs

Weakness Type

CWE-674

References